The VP-type broadband tide meter was developed by improving the circuit system, mechanical system, data acquisition system, and control system on the basis of VS vertical pendulum tiltmeter, a kind of seismological observation instrument used to record earth tides. A good design of the mode of oscillation circuit and zero circuit was needed to improve the circuit system, because it could simplify the instrument circuit, reduce the failure rate caused by electronic circuit, make the continuous operation stable. A reasonable mechanical instrument design, including the design of automatic zero adjustment mechanism and instrument chassis, can simplify the whole structure, make the weight and dimension of the instrument smaller, and easy to be transported and installed. The improvement of data acquisition system includes the improvement of sampling rate, the increase of sampling channel and data storage capacity, and the design of switch control channel. The automatic zero adjustment function was also added. Compared with traditional tiltmeters, VP-type broadband tide meter is easy to install and maintain, for it can store more data and realize remote auto zero. The most obvious advantage of it is that its response to high-frequency signal is sensitive by improving the circuit and mechanical systems, and it can record more seismic information to better service for the earthquake prediction.